Imagick::embossImage()

(PECL imagick 2.0.0)

Returns a grayscale image with a three-dimensional effect

说明

Imagick::embossImage(float $radius,float $sigma): bool

Returns a grayscale image with a three-dimensional effect. We convolve the image with a Gaussian operator of the given radius and standard deviation(sigma). For reasonable results, radius should be larger than sigma. Use a radius of 0 and it will choose a suitable radius for you.

参数

$radius

The radius of the effect

$sigma

The sigma of the effect

返回值

成功时返回TRUE。

错误／异常

错误时抛出 ImagickException。

范例

Example #1 Imagick::embossImage()

<?php
function embossImage($imagePath, $radius, $sigma) {
    $imagick = new \Imagick(realpath($imagePath));
    $imagick->embossImage($radius, $sigma);
    header("Content-Type: image/jpg");
    echo $imagick->getImageBlob();
}
?>

embossImage() will actually return a color image with a 3D effect. If you want a gray scale image, you can use imagefilter() from the regular GD functions. 
<?php
header("Content-type: image/jpeg");
$image = new Imagick("opossum.jpg"); 
$image->embossImage( 0, 1 );
echo $image;
?>